Search results for "One-Pot synthesis"

One-pot synthesis of polyaza[n]naphthalenophanes and polyaza[n]anthracenophanes

1998

Abstract Pernosylated polyaza[n]cyclophanes 13–20 were prepared by a Richman-Atkins modified methodology. Deprotection under mild conditions gave polyaza[n]cyclophanes 21–28 . This methodology allows for the preparation of cyclophanes containing labile C-N bonds.

A ONE-POT SYNTHESIS OFNαBENZYLOXYCARBONYLNω-t-BUTOXYCARBONYL-L-ORNITHINE AND L-LYSINE

1992

One-Pot Synthesis of Trisubstituted 1,2-Amino Alcohols from Deprotonated α-Amino Nitriles

2008

A short synthesis of N,1,2-trisubstituted vicinal amino alcohols by 1,2-addition of deprotonated N-monosubstituted α-amino nitriles to aldehydes and subsequent one-pot reduction of the intermediates with borane–THF is described. This procedure leads to the predominant formation of the anti-configured products. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)

ChemInform Abstract: Asymmetric Allylation/Ring Closing Metathesis: One-Pot Synthesis of Benzo-Fused Cyclic Homoallylic Amines. Application to the Fo…

2013

A stepwise process consisting of asymmetric allylation of imines of type (I) and following ring-closing metathesis of the resulting dienes (III) is developed to synthesize cyclic homoallylic amines.

Front Cover: Glucose as an Eco‐Friendly Reductant in a One‐Pot Synthesis of 2,3‐Dihydroquinazolin‐4(1 H )‐ones (Eur. J. Org. Chem. 41/2020)

2020

One-Pot Synthesis of Polysubstituted Pyrrolidines from Aminonitriles

2005

α-Aminonitriles with a mono- or unsubstituted amino group as well as a-(alkylideneamino)nitriles can be employed as easily accessible α-aminocarbanion equivalents. Their α-deprotonation yields stabilized carbanions, whichundergo smooth 1,4-addition to α,β-unsaturated carbonyl compounds. The resulting δ-ketoα-aminonitriles can be reductively cyclized to form polysubstituted pyrrolidines.

One‐pot synthesis of [2+2]‐helicate‐like macrocycle and 2+4‐μ 4 ‐oxo tetranuclear open frame complexes: Chiroptical properties and asymmetric oxidati…

2020

One‐Pot Synthesis of a New High‐Aluminium‐Content Super‐Microporous Aluminosilicate

2006

A new super-microporous aluminosilicate having a high aluminium content (Si/Al ca. 1) has been prepared through a surfactant-assisted procedure with the use of a commercially available binary precursor (di-sec-butoxyaluminooxytriethoxysilane) as a single source of both Al and Si. The formation of super-micropores is a result of a significant network shrinkage associated with the thermal elimination of the surfactant. This solid has been studied by X-ray powder diffraction, electron microscopy, nuclear magnetic resonance spectroscopy and porosimetry. A preliminary analysis of the acidity and the catalytic activity of the super-microporous solid for the selective catalytic reduction of NOx is…

Organocatalytic Enantioselective Synthesis of α-Hydroxyketones through a Friedel−Crafts Reaction of Naphthols and Activated Phenols with Aryl- and Al…

2016

[EN] An efficient organocatalytic asymmetric synthesis of alpha-hydroxyketones has been developed. Quinine-derived thiourea catalyzed the enantioselective Friedel Crafts alkylation of naphthols and activated phenols with aryl- and alkylglyoxal hydrates, providing the corresponding chiral alpha-hydroxyketones with high yields (up to 97%) and excellent enantioselectivities (up to 99% ee).

One-pot synthesis of graphene quantum dots and simultaneous nanostructured self-assembly via a novel microwave-assisted method: impact on triazine re…

2018

One-step methods for fabricating green materials endowed with diverse functions is a challenge to be overcome in terms of reducing environmental risk and cost. We report a fast and easy synthesis of multifunctional materials composed of only fluorescent dots with structural flexibility and high sorption capability. The synthesis consists of a one-pot microwave-assisted reaction for the simultaneous formation of graphene quantum dots (GQDs) from organic precursors and their spontaneous self-assembly forming porous architectures. The GQD-assemblies are robust and no signs of degradation were observed with most organic solvents. The ensuing GQDs and their porous solids were fully characterized…